diff --git a/src/js/parser/javascript/grammar.peg b/src/js/parser/javascript/grammar.peg
index c7311b6..f0eb426 100644
--- a/src/js/parser/javascript/grammar.peg
+++ b/src/js/parser/javascript/grammar.peg
@@ -1,7 +1,9 @@
 grammar JavascriptRegexp
-  root <- ( ( "/" regexp "/" fl:[igm]* ) / regexp ""? ) <Root>
-  regexp <- match alternates:( "|" match )* <Regexp>
-  match <- anchor_start? ( ( subexp / charset / terminal ) repeat? )* anchor_end? <Match>
+  root <- ( ( "/" regexp "/" _flags:[igm]* ) / regexp ""? ) <Root>
+  regexp <- _match:match _alternates:( "|" match )* <Regexp>
+  match <- _anchor_start:anchor_start?
+           _parts:( ( subexp / charset / terminal ) repeat? )*
+           _anchor_end:anchor_end? <Match>
   anchor_start <- "^"
   anchor_end <- "$"
   repeat <- ( repeat_any / repeat_required / repeat_optional / repeat_spec ) repeat_greedy?
diff --git a/src/js/parser/javascript/regexp.js b/src/js/parser/javascript/regexp.js
index 97b6e2c..9b08a0d 100644
--- a/src/js/parser/javascript/regexp.js
+++ b/src/js/parser/javascript/regexp.js
@@ -60,6 +60,6 @@ export default _.extend({}, Base, {
   },
 
   matches() {
-    return [this.match].concat(_.map(this.alternates.elements, _.property('match')));
+    return [this._match].concat(_.map(this._alternates.elements, _.property('match')));
   }
 });
diff --git a/src/js/parser/javascript/root.js b/src/js/parser/javascript/root.js
index 3969101..960ec31 100644
--- a/src/js/parser/javascript/root.js
+++ b/src/js/parser/javascript/root.js
@@ -33,8 +33,8 @@ export default _.extend({}, Base, {
   flags() {
     var flags;
 
-    if (this.fl) {
-      flags = this.fl.textValue;
+    if (this._flags) {
+      flags = this._flags.textValue;
     } else {
       flags = '';
     }